Apple 4400/200 PC manual

Basics	Dual In-Line Memory Modules (DIMMs) - 12
	computers, use only the shortest of the three (1.100
	inches). Taller DIMMs put excessive pressure on the DIMM
	sockets due to mechanical pressure inside the case.
	The DIMMs can be installed one or more at a time. In the
	4400/160 each DIMM slot can support up to a 32 MB bank
	of memory. In the 4400/200 and 7220/200, the first
	DIMM slot supports up to a 32 MB bank and the other two
	support up to 64 MB in each. The logic board supports only
	linear memory organization. The combined memory of all of
	the DIMMs installed will be configured as a contiguous
	memory space.